Kirsh, PhD, K. L.; Heit, MD, H. A.; Huskey, PharmD, CPE, A.; Strickland, PharmD, BCPS, J.; City, MA, BSN, RN, K. E.; Passik, PhD, S. D. Trends in Drug Use from Urine Drug Testing of Addiction Treatment Clients. J of Opioid Management 2015, 11.